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Bismuth vanadate composite photo-anode protected by polyimide and preparation method of photo-anode

A polyimide and polyimide precursor technology, which is applied in the field of polyimide-protected bismuth vanadate composite photoanode and its preparation, can solve the problem of poor stability of the cocatalyst, hindering the contact between holes and water, and easy decomposition. and other problems, to achieve the effects of good stability, improved photoelectric conversion efficiency, and high photocurrent density

Active Publication Date: 2019-08-27
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cocatalyst is usually less stable and is easy to decompose during the reaction process. In addition, the protective layer also hinders the contact between holes and water, inhibiting the water oxidation reaction.

Method used

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  • Bismuth vanadate composite photo-anode protected by polyimide and preparation method of photo-anode
  • Bismuth vanadate composite photo-anode protected by polyimide and preparation method of photo-anode
  • Bismuth vanadate composite photo-anode protected by polyimide and preparation method of photo-anode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Preparation of bismuth vanadate seed layer: Weigh 0.3638g of bismuth nitrate and 0.4384g of ethylenediaminetetraacetic acid and dissolve them in 15ml of water, add 1ml of ammonia water to adjust the pH to 10, stir until dissolved, and prepare A solution; weigh Dissolve 0.0877g of ammonium metavanadate and 0.1096g of ethylenediaminetetraacetic acid in 15ml of water, add 1ml of ammonia water to adjust the pH to 10, stir until dissolved, and prepare B solution; mix A solution and B solution, continue to stir and mix uniformly prepared the seed layer precursor solution, put the FTO conductive glass on a spin coater, take the seed layer precursor solution for spin coating, spin coating 3 times, and keep it at 500°C for 10 minutes after each spin coating, and finally put the The spin-coated FTO conductive glass was kept in air at 500°C for 2 hours to obtain a bismuth vanadate seed layer;

[0029] (2) Preparation of bismuth vanadate film photoanode: Disperse 0.1455g of bis...

Embodiment 2

[0032] (1) Preparation of bismuth vanadate seed layer: Weigh 0.3638g of bismuth nitrate and 0.4384g of ethylenediaminetetraacetic acid and dissolve them in 15ml of water, add 1ml of ammonia water to adjust the pH to 10, stir until dissolved, and prepare A solution; weigh Dissolve 0.0877g of ammonium metavanadate and 0.1096g of ethylenediaminetetraacetic acid in 15ml of water, add 1ml of ammonia water to adjust the pH to 10, stir until dissolved, and prepare B solution; mix A solution and B solution, continue to stir and mix uniformly prepared the seed layer precursor solution, put the FTO conductive glass on a spin coater, take the seed layer precursor solution for spin coating, spin coating 3 times, and keep it at 500°C for 10 minutes after each spin coating, and finally put the The spin-coated FTO conductive glass was kept in air at 500°C for 2 hours to obtain a bismuth vanadate seed layer;

[0033] (2) Preparation of bismuth vanadate film photoanode: Disperse 0.1455g of bis...

Embodiment 3

[0036](1) Preparation of bismuth vanadate seed layer: Weigh 0.3638g of bismuth nitrate and 0.4384g of ethylenediaminetetraacetic acid and dissolve them in 15ml of water, add 1ml of ammonia water to adjust the pH to 10, stir until dissolved, and prepare A solution; weigh Dissolve 0.0877g of ammonium metavanadate and 0.1096g of ethylenediaminetetraacetic acid in 15ml of water, add 1ml of ammonia water to adjust the pH to 10, stir until dissolved, and prepare B solution; mix A solution and B solution, continue to stir and mix uniformly prepared the seed layer precursor solution, put the FTO conductive glass on a spin coater, take the seed layer precursor solution for spin coating, spin coating 3 times, and keep it at 500°C for 10 minutes after each spin coating, and finally put the The spin-coated FTO conductive glass was kept in air at 500°C for 2 hours to obtain a bismuth vanadate seed layer;

[0037] (2) Preparation of bismuth vanadate film photoanode: Disperse 0.1455g of bism...

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Abstract

The invention discloses a bismuth vanadate composite photo-anode protected by polyimide and a preparation method of the photo-anode. The composite film photo-anode comprises a bismuth vanadate nano sheet and the polyimide polymerized to the bismuth vanadate nano sheet in situ. The preparation method of the bismuth vanadate composite photo-anode comprises the steps that firstly, a bismuth vanadatephoto-anode is prepared, then placed in a polyimide precursor solution, pre-polymerized in situ, and finally subjected to thermal polymerization at a high temperature, and the polyimide / bismuth vanadate composite film photo-anode is prepared. The composite film is high in water oxidation current density, low in oxygen deposition potential and good in stability, and the preparation method is simple, low in cost and high in operability.

Description

technical field [0001] The invention belongs to the field of composite films, in particular to a polyimide-protected bismuth vanadate composite photoanode and a preparation method thereof. Background technique [0002] Since the beginning of the 21st century, energy crisis and environmental pollution have become two major problems that people are facing. Therefore, finding efficient, clean and renewable energy is of great significance to human civilization. Among many clean energy sources, hydrogen energy is considered to be the best choice for future energy due to its renewable, clean and non-polluting, high combustion calorific value and other advantages. At present, industrial hydrogen is mainly produced by extracting from fossil fuels, which will not only cause additional energy loss, but also generate a large amount of greenhouse gases, and will also aggravate the depletion of fossil fuels. Photoelectrocatalytic water splitting has opened up a new way for efficient, cl...

Claims

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Application Information

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IPC IPC(8): C25B1/04C25B11/06B01J35/00B01J31/36
CPCC25B1/04B01J31/36C25B1/55C25B11/051C25B11/091B01J35/33Y02E60/36
Inventor 王涛高斌范晓莉李斌严娟娟姜澄孙志鹏李洋何建平黄现礼
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS